Dynamometer.



F. N. CONNET.

DYNAMOMETBR.

APPLICATION FILED APR. 8. 1907.

931,274, Patented Aug. 17, 1909.

1m JEIIIIII" anuenl'oz I To all it may concern:

STATES PATENT o FIoE.

FREDERICK N. CONNET, 'OF PROVIDENCE, RHODE ISLAND.

DYNAMOME TEE.

Specification of Letters Patent.

Paten ed Aug. 7,'1e09 Application filed April 8, 1907. Serial No.366,938.

Be it known that I, FREDERICK N. CONNET, a citizen of the United States,residing at the city of Providence, in the county of Provideuce andState of Rhode Island, have invented certain new and-useful Improvementsin Dynamometers, of which the following is a specification,referencebeing had therein to the accompanying drawing.

\This invention relates to dynamometers and has for its object [toprovide a simple and practical instrument for indicating and Vautomatically recording the horsepower of liquids or gases flowingthrough a supply pipe, said instrument being controlled in its actionby-the pressure in said pipe, and also.

by the volume passing therethrough.

In carrying out my invention any means may be used for determining thevolume passing through 'said pipe, but I preferably employ a pipe ortube insertedinto the main supply pipe, said tube being si'milar inconstruction to what is commonly known as the Venturi' tube described inthe United States Patent No. 381,373, April 17, "1888,

and order to obtain the volume or quantity passing throughsaid tubeIhave con nected two chambers thereto, one communieating withthe iipstream or high pressure side of the tube and the second communicatingwitli the throat or reduced 'pressureportion of the same; In thesechambers floats are located whereby the difference between the pressuresat the two points are arrangedto operate mechanism to ndicate the volumeor quantity flowing therethrough. In determining the pressure in saidpipe any conveniegt means may be used, but for simplicit -Ihave'illustnated a cylinder connected to the said main/supply pipewhereby a piston in said cylinder isactuated by the working pressure inthe pipe to co-act-with the quantity indicating mechanism, whereby thecombined movement of both operates gears through which the two floatsoperate to move the actuating cam.

The following is a detail descriptionof one form of mechanism that maybe employed to determine the quantity passing (through the tube.

pair of cylinders 2 and 3,the former being set somewhat higher than thelatter cylinder, These cylinders are connected to ether at their lowerends by the pipe 4. T e 11 per tend of cylinder 2 is provided wit shortneck 5' communicating with the con.-

7, and extends upward from sa d openin n line with said neck making thewholecy i .der sel'frcontained and water-tight. The cyl; inderggi isconnected with a longer neck 8 and also communicateswith a circularchem.- ber 9 corresponding to and in line horiaon? tally with saidchamberfi, and astandepipe 10 extends upward from the enema 9 in limiter line with its neck'S-making this 'cy also tight against the pressureof water At l3is a horizontal shaft extendin from the circular, chamber9 through the circular chamber .6 and-into a record casingnot shown, theactuating cam 14 being mounted on its end. A gear. 15 located in chamber6 is mounted on and fixed to this shaft, and

Referring tothe drawings, at 1 is the base pf the frame on which issupported a.

tral opening 6, see Fig. 2, and-the standpipe similar gear 16 located inchamber 9 is also mounted and fixed to this same shaft. At 17 and 18aretwo floats adapted to rest on and be movedtvertically by the changeinthe level, of the mercury in both of the cylinders. To the upper endof float l? is conne'cted a long'rack 20 adapted to engage one .sideofthe gear 15, while to the float 18 is also connected similar rack 21adapted to engage the opposite side of the gear 3L6;

When either of the floats is way up the rack extends into its stand ipeand when the float isway down the ottom hi the same rests upon the lowerend of its center.

said cam 14 through the contact wheel 25 and at 26 is a scale over whichthe finger 27:

At 22 I have shown an upright bar adapt.-

ed to be moved in its bearings 23 and 2% by passes to indicate the.quantity pass ng through-the tube by any convenient unit oi measure.

. At 28 is an inclined bar pivoted at its lower end at 29, said barbeing slotted at 30 for the greater portion of its length and also atits upper end 31, through which latter slot the pin 32, which is fixedto the bar 22,

. passes.

floating pin 38 is passed loosely through the slot 30 and 36.

In order to obtain the effect of the pressure in the supplyjdpipe ahorizontal cylinder 39 is provide the same being connected to the supplypipe '40 on the up stream side of the Venturi tube 4l, through the pipe42. A piston 43 is held to reciprocate in this-cylinder, and is arrangedto actagainst the balance spring 44, the outer end of said springabutting against the fixed wall 45. This piston is provided with a rod46 on the outer end of which is a cross-bar provided with an elongatedslot 47 which slotted ortion also engages the above-mentioned oating pin38. At 48 is a continuously moving chart which is adapted to be unwoundfrom one roll 49 and wound onto a corresponding roll 50 by means ofclock mechanism, not. shown, in the casing 51 through the gears 52 and53. The vertical lines on this chart represent the twenty-four hours ofthe day, while the distance between the horizontal lines thereon mayrepresent any predetermined number of horse power.

In the operation of this device the liquids or gases flow through thetube 41 in the direction indicated by the arrow. The upstream side ofthe'tubeis connected at 54 by means of pipe 55 to the cylinder 3, whilethe throat is' connected at 56 by the pipe 57 to the cylinder 2.

When there is no flow through the tube the pressure at all points of thetube is, of course, equal, and the floats in both cylinders are at thesame height, the quantity mechanism standing at zero; As

' soon as the flow begins the pressure in the throat is decreased andbecomes less than that at the point 54, therefore the mercury in chamber3 is forced downward by the excess of pressure on this side, raising themercury and float in the opposite chambers a corresponding amount. Asthese floats move and one down they act with correspondmg force throu htheir respective racks and gears on theshai t 13 to rotate the actuatingcam 14 in proportion to their movemerit. The greater the velocity offlow through the tube the greater the difierence at these two points andconsequently the greater the movement of the cam 14. The

' rotation of thiscamserves to move the bar 32 anamount in proportion tothe quantity passing through the tube which quantity 'may also beindicated bythe flnger 27 on the scale 25. v

The vertical movement of the bar 22 is arranged to also give aproportional vertical movement to the tracer bar'33 through the inclinedbar 28 and floatin pin 38. In figuring the horse power of owing liquidsor gases it is necessary that the quantity be multiplied by thepressure, the bar 22 representing the quantity, and the piston 32working in the cylinder 39 representing the pressure, the mechanismbeing so arranged that an outward movement- 'of the piston actuated bythe pressure, co-acts with the movement of the quantity bar to againraise the tracer by sliding the floating pin farther upward in the slot30 of the inclined bar, whereby the resultant eflect of these two forcesmove the tracer overt-he chart to correctly indicate the horse power ofthe fluid passing through the supply pipe.

The principle of m dynamometer or horse power recording evice isrepresented by a diagrammatic view in the simplest pos sible form, but Ido not restrict myself to the construction and arrangement of partsshown and described nor to the various detailsthereof, as anyarrangement 'of mechanism for automatically indlcating the horse ower offlowing liquids or gases through a conductor by a sin le rectilinearmotion of a recording armwi ll come within the spirit and scope of myinvention,-one practical arrangement of which has been hereinillustrated and described without attempting to show all of the variousforms and modifications in which my invention might be embodied. a

Having thus described my inyentionwhat bar loosely connected at one endto said member, a movable rod, means actuated in proportion to thepressure in said pipe for moving said rod, an, indicating member, and asingle mean-s for providing ashiftin connection between said pivoted barand said rod, and also between said bar and said indicating member;

2.oA dynamometer comprising a movable member, ,means operated by thedifference between pressures at two points in a supply main for movingsaid member, a pivoted bar loosely connected at one end to sa d member,

an indicator member operatively connected with sai" bar, a movablerod,-;1'neans actuated in proportion to the pressure in said mainfor'moving said rod, and means for providing a shifting connectionbetween said rod and bar.

7 3. A dynamometer comprising a movable member, means operated bythediflerence between pressures at two points in a supply main for movingsaid member, a pivoted bar loosely connected at one end to saidmempmmounted in saidvslot, an indicator member connected to said pin, amovable rod,

-a movable rod, and means actuated in pro-' between pressures at twopoints in a supply movable member having one end in engageber, said barbeing slotted, a floating pin mounted in the slot of said bar, anindicator member operatively connected with said bar, amovable rod, andmeans actuated in proportion to the pressure in said. main for actuatingsaid rod, said rod engaging said pin.

4. A' dynamometer comprising a movable member, meansoperated by thediiference between the pressures at two points in asup ply main formoving said member, a pivoted bar loosely connected at one, end to saidmember and provided with a slot, a floating pin mounted in said slot, anindicator memand means actuated in proportion to the, pressure in saidmain. for moving said rod, said rod also engaging said pin.

5. A dynamometer comprising a movable member, means operated bytl1e"ditfere1ice in pressure between two points in a supply main formoving said member,-.a pivoted bar loosely connected at one end to saidcator member operatively connected with said bar, a floating pin mountedin said slot,

portion to the pressure in said main for moving-said rod, said rod beingprovided w th a slot engaging said floating pin.

(3. A dynanioin'eter comprising a movable member, means operated by thedifference main for moving said member, a pivoted bar loosely connectedat one end to said member and provided with a'slot, a floating pinmounted in said slot, an indicator member provided with a slot engaging,said pin, a movable rod, and means actuated in pro-. portion to thepressure in said pi for inoving. said rod, said rod being provided witha slot also engaging said floating pin.

7. A dynamomjeter comprising a movable member, means operated by thedifference between pressures at two points ina supply main for movingsaid member, a pivoted bar loosely connected at one end to said memberand provided with a slot, a floating ber provided .with a slot engagingsaid pin, a movable rod, and means actuated in pro= portion to thepressure in said. ma in'for moving said rod, said rod being providedwith a slotalso engaging said tloating'pin, the slots of said rod andsaid indicator member being arranged at right angles to each other.

8, In-a dyiiamometer, the combination of. amain supply pipe, a rotatablecam, means for operating said cam, said operating means being controlledby the difference between the pressures at two pointsin said pipe, a

ment with said cam, pressure controlled means actuated inproportion tothe pressure in said pipe, and indicating means operatively connectedwith said member and said with the difference between the pressures attwo points in said pipe, a movable member operated by said cam, pressurecontrolled means actuated in proportion to the pressure in said pipe, anindicator member, and means operatively connecting said indicator member with said movable member and said pressure controlled means, wherebysaid indicator member is given a single rectilinear motion through thecombined'action of said member and said pressure actuated means.

10. In a dynamometer, the combination of a main supplypipe, a rotatablecam, means for operating said cam, said operating means being controlledby the difference in pressure at two points in said pipe, a memberhaving one end in engagement with said cam, pressure controlled meansactuated in proportion to the pressure in said pipe, a tracer memberoperatively connected with said member and said pressure controlledmeans, whereby said tracer member is operated through the combinedaction of said member and said pressure actuated means, and means forfeeding a record sheet in operative relation to said tracer.

11. A dynamometer comprising a cam, means for operating said camcontrolled by the difference between the pressures at two points in asupply main, a member actuated by s'aid'cam, a pivoted bar operativelyconnected with said member, a movable rod, means operated in pi'opor'tiI to the pressure in said main for moving said rod, an indicatormembeiy'and means for providing a shifting connection between .saidpivoted bar and said rod, and also between said bar and said indicatormember. v

12. A dynamometer comprising a cam, means for operating said cam, saidmeans including floats controlledbythe difference between pressures attwo points in a. supply main, a member actuated by said cam, a. pivotedbar operatively' connected with said member, a movable rod, meansoperated'in proportion to the pressure in said main for moving said rod,an indicator member, and means forproviding a shifting connectionbetween said pivoted bar and said rod, and also between said bar andsaid indicator member. 1

In testimony whereof I aflix my-signature in presence of two witnesses.e

- FREDERICK N; CONNET.

Witnesses:

HowAiu) E. BARLOW,

E.- I. OGDEN.

